MdePkg/IndustryStandard: Add additional Atapi.h definitions.
MdePkg/IndustryStandard: Add additional Atapi.h definitions.

Add definitions complying Industry Standard specifications.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Anandakrishnan Loganathan <cee8dd7611bd44a220bd7f8f36db2dc4fe2a9c12@ami.com>
Reviewed-by: Feng Tian <e66bb7e9f36c82a029035c5885acf75500d07e68@intel.com>

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